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ortho-phosphoric acid 85%

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Analytical Method: Urea in Liquid Manure
Photometric determination with Diacetyl monooxime
Analytical Method: Urea in Milk (Photometry)
Photometric determination with Diacetyl monooxime in the sample clarified with Trichloracetic acid
Sildenafil Citrate Method (HPLC) following USP Monograph on Ascentis® Express C18 with UV detection
Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension.
Lopinavir European Pharmacopeia HPLC Assay Method
This paper illustrates the setting up of a Lopinavir assay following European pharmacopoeia guidelines (10.2), and using a shorter column packed with smaller particles. The described assay saves valuable time and improves separation efficiency, which typically translates to better method
Chromatographic Testing of Black Pepper According to the United States Pharmacopeia
Powdered black pepper was chosen as example for dietary supplements, being a source for pierine. It is tested according to the current United States Pharmacopeia (USP) guidelines using HPTLC and HPLC.
Enzymatic Assay of Endoproteinase Glu-C (EC 3.4.21.19)
This procedure may be used for determination of Endoproteinase Glu-C enzymatic activity using N-t-Boc-L-glutamic acid α-phenyl ester as the substrate.